Roman Vershinin Email and Phone Number

Mentoring and supporting Engineers, Data Scientists and Tech Leads in their career development

* Technical Lead for business-critical products in continuously growing logistics outbound system with 100.000+ orders per day* end-to-end responsibility for products: "you build it - you run it"* team and department representative in Company Architecture/Core groups* mentoring of newcomers* taking part in recruitment processUsed languages: Java, Javascript, PythonUsed frameworks: Spring(Core, Data JPA, MVC, Boot, Cloud), Hibernate, Sencha Ext JS, Pandas, GurobiUsed databases: Oracle, PostgreSQL, ElasticSearch, RedisAWS: S3, RDS, SQS, SNS, ElasticSearch ServiceOperating Systems: Ubuntu, CentOS

* development and maintenance of business-critical products in in-house logistics outbound systemUsed languages: JavaUsed frameworks: Spring(Core, Data JPA, MVC, Boot, Cloud), HibernateUsed databases: Oracle, PostgreSQL, ElasticSearchOperating Systems: Ubuntu, CentOSWide use of AWS services

Key responsibilities:* Development of customised ETL frameworkUsed languages: Java, Scala, GroovyUsed frameworks: Junit, Scalatest, Spock, Logback, Spring (Core, Batch, Integration, Boot), Scalatra, Apache Spark, Apache Flume, Apache MINA, ActiveMQ, Guava, LombokUsed databases: H2, OracleUsed OS: WIndows, Red Hat

Key tasks and responsibilities:* Development of high-performance telecom platform and services built upon it for mobile operators: - Monitoring component, tracking all the events on the platform in flexible and customizable way. It simplified incident analisys in high-load system; - Component for access control and accounting of mobile traffic consumption according to specified policies and rules. It processes all traffic from a mobile operator subscribers over the country; - Web applications for service management system; - REST and SOAP web services for automatic collaboration with customers systems; - Refactoring fragile legacy code, that resulted in faster implementation of new change requests without side-effects; - Unit and component testing. Increasing test coverage allowed to exclude business logic errors in production and helped to focus on development new features.* Conducting technical interviews;* Translation of user needs into technical requirements and JIRA tasks;Used languages: Java, Groovy, Scala, C#Used frameworks: JUnit, Mockito, Spock, Logback, Netty, Spring(Core, Data JPA, MVC, Boot), JAX-RS, Jersey, Apache Camel, RabbitMQ, Akka, Hazelcast, JPA, Hibernate, Wicket, JAXB, Jackson, Guava, LombokUsed databases: MySQLOperaing System: Ubuntu, RedHat

Key tasks and responsibilities:* Development of plug-ins extending standard functionality for ERP system SAP Business One, satisfying different user needs: simplification and performance improvement for routines, adaptation of available tools to customer's business process and local regulation; * Development of data exchange platform for SAP Business One and 1C Enterprise, that allowed to refuse duplicating manual input for different systems; * Development of error monitoring solution for data exchange platform(Java SE, Swing, JDBC); * Development of prototype of software for estimation and monitoring key indicators of river gateway in real-time, that allowed company to win the government tender; * Administrating of MS SQL Server with test databases; * Software installation and tuning, technical support.Used languages: mainly C#, SQL, VBA, rarely Java and CUsed frameworks: WPF, SAP B1 API, Swing, JDBCUsed databases: MS SQLOperating system: Windows XP, 7

Development of Access Control System:* Personnel and visitors control module;* Module testing.Used languages: C/C++, XSLTUsed frameworks: QtUsed databases: PostgreSQLOperating System: Fedora